Die casting and vehicle

Abstract

The die casting comprises a die casting body which is suitable for being connected with a connecting piece through a self-punching-riveting connecting technology, the die casting body is provided with a self-punching-riveting connecting area, the self-punching-riveting connecting area is provided with a boss, and the boss is located on the side, away from the connecting piece, of the die casting body. According to the die casting, the thickness of residual materials in the self-punching riveting connecting area of the die casting body can be increased, the distance between the bottom of the rivet and the bottom of the die casting body can be increased, and the deformation of materials at the bottom of the die casting body can be reduced, so that the cracking tendency of the die casting body is reduced or eliminated, and the problem that the die casting cracks in the self-punching riveting connecting area is solved. Meanwhile, the interlocking value of the self-punching-riveting connecting area can be increased, and the strength of the self-punching-riveting connecting area is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a die casting and a vehicle. Background Art

[0002] In the related art, since the material elongation of the connection area between die-castings, especially one-piece die-castings and surrounding parts is low, cracking is prone to occur. Cracks will expand due to complex loads during the subsequent use of the vehicle, causing cracks in the die-casting body, which may cause abnormal noises, deformation or even disintegration in the vehicle, affecting the use and safety of the vehicle. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a die casting, which can reduce or eliminate the cracking tendency of the die casting body and solve the cracking problem of the die casting in the self-piercing riveting connection area.

[0004] Another object of the present invention is to provide a vehicle having the above die casting.

[0005] The die-casting according to the embodiment of the utility model includes: a die-casting body, which is suitable for being connected to a connecting piece through a self-piercing riveting connection process, and the die-casting body has a self-piercing riveting connection area, and the self-piercing riveting connection area has a boss, and the boss is located on the side of the die-casting body away from the connecting piece.

[0006] According to the die casting of the embodiment of the utility model, by providing a boss on the side of the self-piercing riveting connection area of ​​the die casting body away from the connector, the remaining material thickness of the self-piercing riveting connection area of ​​the die casting body can be increased, the distance between the bottom of the rivet and the bottom of the die casting body can be increased, and the deformation of the material at the bottom of the die casting body can be reduced, thereby reducing or eliminating the cracking tendency of the die casting body and solving the cracking problem of the die casting in the self-piercing riveting connection area. At the same time, the interlocking value of the self-piercing riveting connection area can be increased, and the strength of the self-piercing riveting connection area can be enhanced.

[0007] In some embodiments of the present invention, there are a plurality of self-piercing rivet connection areas, and there are a plurality of bosses corresponding one-to-one to the plurality of self-piercing rivet connection areas.

[0008] In some embodiments of the utility model, the die-cast body includes a main body portion and an overlapping edge connected to the main body portion, the overlapping edge is suitable for being connected to the connecting piece through a self-piercing riveting process, and the self-piercing riveting connection area and the boss are arranged on the overlapping edge.

[0009] In some embodiments of the present invention, the overlapping edge includes a first overlapping edge, the first overlapping edge is parallel to the mold opening direction of the die casting, and the plurality of bosses include a first boss, and the first boss is arranged on the first overlapping edge.

[0010] In some embodiments of the present utility model, the first boss includes: a first convex portion spaced from the body portion, and the first overlapping edge at the position of the first convex portion is connected to the connecting member; a second convex portion located between the first convex portion and the body portion and connected to the first convex portion and the body portion at both ends respectively. In the direction from the first convex portion to the body portion, the width of the first boss gradually increases.

[0011] In some embodiments of the present utility model, the cross-section of the first convex portion is circular, and the opposite side walls of the second convex portion are tangent to the opposite sides of the first convex portion.

[0012] In some embodiments of the present utility model, the diameter of the first convex portion is greater than or equal to 23 mm.

[0013] In some embodiments of the present utility model, on the cross-section of the first boss, the angles between the side walls on the opposite sides of the second convex portion and the mold opening direction of the die-casting part are both greater than or equal to 5°.

[0014] In some embodiments of the present utility model, along the mold opening direction of the die-casting part, in the direction from the body portion to the first boss, the surface of the first boss facing away from the first overlapping edge is inclined towards the direction close to the first overlapping edge.

[0015] In some embodiments of the present utility model, the angle between the surface of the first boss facing away from the first overlapping edge and the mold opening direction of the die-casting part is greater than or equal to 1.5°.

[0016] In some embodiments of the present utility model, the overlapping edge includes a second overlapping edge perpendicular to the mold opening direction of the die-casting part, and a plurality of the bosses include a second boss provided on the second overlapping edge.

[0017] In some embodiments of the present utility model, the cross-section of the second boss is circular, and the diameter of the second boss is greater than or equal to 23 mm.

[0018] In some embodiments of the present utility model, a fillet is provided between the second boss and the second overlapping edge, and the radius of the fillet is greater than or equal to 0.25 mm.

[0019] In some embodiments of the present utility model, the mold for forming the die-casting body has a gate, and for any two of the plurality of bosses, the height of the boss relatively farther from the gate is greater than the height of the boss relatively closer to the gate.

[0020] In some embodiments of the present invention, the height of the boss is 0.5 mm-1.5 mm.

[0021] In some embodiments of the present invention, the die-casting part is an aluminum alloy part.

[0022] The vehicle according to the embodiment of the utility model comprises: the above-mentioned die-casting part and the connecting part, wherein the die-casting body and the connecting part are connected by a self-piercing riveting process.

[0023] According to the vehicle of the embodiment of the utility model, by setting the above-mentioned die-casting, a boss is set on the side of the self-piercing riveting connection area of ​​the die-casting body away from the connecting piece, which can increase the residual material thickness of the self-piercing riveting connection area of ​​the die-casting body, increase the distance between the bottom of the rivet and the bottom of the die-casting body, and reduce the deformation of the material at the bottom of the die-casting body, thereby reducing or eliminating the cracking tendency of the die-casting body and solving the problem of cracking of the die-casting in the self-piercing riveting connection area. At the same time, the interlocking value of the self-piercing riveting connection area can be increased, and the strength of the self-piercing riveting connection area can be enhanced.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a three-dimensional diagram of a die casting according to an embodiment of the utility model;

[0027] Figure 2 It is a partial enlarged view of a die casting according to an embodiment of the utility model;

[0028] Figure 3 is an enlarged view of a first overlapping edge portion of a die casting according to an embodiment of the utility model;

[0029] Figure 4 It is an enlarged view of the second overlapping edge portion of the die casting according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] 100. Die castings;

[0032] 1. die-cast body; 11. body portion; 12. lap edge; 121. first lap edge; 122. second lap edge;

[0033] 2. Self-piercing riveting connection area;

[0034] 3. Boss; 31. First boss; 311. First convex part; 312. Second convex part; 32. Second boss. Detailed implementation mode

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] The die-cast part 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0037] As Figure 1 and Figure 2 shown, the die-cast part 100 according to an embodiment of the present invention includes a die-casting body 1.

[0038] Specifically, the die-casting body 1 is adapted to be connected to a connecting member by a self-piercing riveting connection process. The die-casting body 1 has a self-piercing riveting connection area 2, and the self-piercing riveting connection area 2 is used for connecting with a rivet. The self-piercing riveting connection area 2 has a boss 3, and the boss 3 is located on the side of the die-casting body 1 facing away from the connecting member.

[0039] The die-casting body 1 of the die-cast part 100 is adapted to be connected to a connecting member by a self-piercing riveting connection process using a rivet. Wherein the connecting member is used as the upper layer plate and the die-cast part 100 is used as the lower layer plate. When the rivet, the riveting die and the connecting member remain unchanged, the greater the thickness of the lower die-casting body 1, the greater the distance between the bottom of the rivet and the bottom of the die-casting body 1, which can reduce the amount of material deformation at the bottom of the die-casting body 1, thereby reducing or eliminating the cracking tendency of the die-casting body 1. When the thickness of the lower die-casting body 1 reaches the critical value, the self-piercing riveting connection area 2 does not crack. And the greater the distance between the end of the nail foot that is separated outward and the vertical line of the top foot, the greater the connection strength of the self-piercing riveting connection area 2 can be enhanced.

[0040] In the present application, after adding the boss 3 at the position of the self-piercing riveting connection area 2, the remaining thickness of the lower layer plate at the self-piercing riveting connection position increases, the distance between the bottom of the self-piercing rivet and the bottom of the die-casting body 1 increases, and the amount of material deformation at the bottom of the die-casting body 1 decreases. In the case of a low elongation rate, the reduction of the deformation amount can reduce or even eliminate the cracking tendency of the die-casting body 1, thereby solving the problem of cracking of the die-cast part at the self-piercing riveting connection area 2. At the same time, after adding the boss 3 at the position of the self-piercing riveting connection area 2 of the die-cast part, the interlock value at the connection position increases, and the strength of the self-piercing riveting connection area 2 at this position increases. In addition, in the present application, by adding the boss 3 at the self-piercing riveting connection area 2, it is possible to avoid thickening the entire die-casting body 1, save the material usage amount, reduce the production cost, and the processing operation is simple and can be applied to multiple positions.

[0041] According to the die casting 100 of the embodiment of the utility model, by providing a boss 3 on the side of the self-piercing riveting connection area 2 of the die casting body 1 away from the connector, the remaining material thickness of the self-piercing riveting connection area 2 of the die casting body 1 can be increased, the distance between the bottom of the rivet and the bottom of the die casting body 1 can be increased, and the deformation of the material at the bottom of the die casting body 1 can be reduced, thereby reducing or eliminating the cracking tendency of the die casting body 1, and solving the cracking problem of the die casting in the self-piercing riveting connection area 2. At the same time, the interlocking value of the self-piercing riveting connection area 2 can be increased, and the strength of the self-piercing riveting connection area 2 can be enhanced.

[0042] In some embodiments of the present invention, there are multiple self-piercing riveting connection areas 2, and there are multiple bosses 3 corresponding to the multiple self-piercing riveting connection areas 2. The die-cast body 1 and the connector are connected through multiple self-piercing riveting connection areas 2 at different positions, which can enhance the reliability of the connection between the die-cast body 1 and the connector. Of course, there can be multiple connectors, and each connector can be connected to the die-cast body 1 at at least one self-piercing riveting connection area 2 through a self-piercing riveting connection process.

[0043] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the die-cast body 1 includes a body portion 11 and an overlapped edge 12 connected to the body portion 11, the overlapped edge 12 is suitable for connecting with the connecting piece through a self-piercing riveting connection process, and the self-piercing riveting connection area 2 and the boss 3 are arranged on the overlapped edge 12. The overlapped edge 12 can be a flanging structure arranged on the body portion 11, and the overlapped edge 12 is connected to the connecting piece, which facilitates the connection between the die-cast body 1 and the connecting piece, and can improve production efficiency. At the same time, while achieving connection with the connecting piece, damage to the main structure of the die-cast body 1 is avoided.

[0044] In some embodiments of the present invention, Figure 3 As shown, the overlap edge 12 includes a first overlap edge 121, which is parallel to the die opening direction of the die casting 100, and the plurality of bosses 3 includes a first boss 31, which is arranged on the first overlap edge 121. The extension direction of the rivet can be perpendicular to the die opening direction, thereby realizing the connection between the die casting body 1 and the connecting piece in a direction perpendicular to the die opening direction.

[0045] In some embodiments of the present invention, Figure 3As shown, the first boss 31 includes a first convex portion 311 and a second convex portion 312. The first convex portion 311 is spaced apart from the main body portion 11. The first overlapping edge 121 at the position where the first convex portion 311 is located is connected to the connecting member, which can reduce the interference of the main body portion on the connection between the first overlapping edge 121 and the connecting member and facilitate the connection between the first overlapping edge 121 and the connecting member. The second convex portion 312 is located between the first convex portion 311 and the main body portion 11 and is connected to the first convex portion 311 and the main body portion 11 at both ends respectively. In the direction from the first convex portion 311 to the main body portion 11, the width of the first boss 31 gradually increases. The first boss 31 is overall in a horn shape, and the second convex portion 312 is a transition zone. The function of the transition zone is to fill the filling negative angle between the first convex portion 311 and the die-cast body 1, so that the die-cast body 1 and the first boss 31 can be demolded smoothly.

[0046] In some embodiments of the present utility model, as Figure 3 shown, the cross-section of the first convex portion 311 is circular, and the opposite side walls of the second convex portion 312 are tangent to the opposite sides of the first convex portion 311. Thus, the first convex portion 311 and the second convex portion 312 can be processed into a whole, which can simplify the operation process and improve production efficiency. In addition, an appropriate transition zone is provided between the first convex portion 311 and the main body portion 11, so that the die-cast body 1 and the first boss 31 can be demolded smoothly.

[0047] In some embodiments of the present utility model, the diameter of the first convex portion 311 is greater than or equal to 23 mm. Thus, in the radial direction of the rivet, a relatively large remaining material thickness of the bottom layer plate, that is, the first overlapping edge 121, can be ensured within the connection range of the rivet, reducing the material deformation amount of the first overlapping edge 121, and reducing or even eliminating the cracking tendency of the first overlapping edge 121, thereby solving the problem of cracking of the self-piercing riveting connection zone 2 on the first overlapping edge 121. At the same time, the interlocking value of the rivet in the upper and lower layer plates is increased, improving the connection strength.

[0048] In some embodiments of the present utility model, on the cross-section of the first boss 31, along the die-opening direction of the die-cast part 100 and in the direction from the first convex portion 311 to the second convex portion 312, the opposite side walls of the second convex portion 312 are inclined away from each other, and the angles between the opposite side walls of the second convex portion 312 and the die-opening direction of the die-cast part 100 are both greater than or equal to 5°. Thus, it is convenient for the die-cast body 1 and the first boss 31 to be demolded.

[0049] In some embodiments of the present utility model, as Figure 3As shown, along the mold opening direction of the die-cast part 100, in the direction from the main body part 11 to the first boss 31, the surface of the first boss 31 facing away from the first overlapping edge 121 is inclined towards the direction close to the first overlapping edge 121. The surface of the first boss 31 facing away from the first overlapping edge 121 is an inclined plane as a whole, which facilitates the demolding of the die-cast body 1 and the first boss 31.

[0050] In some embodiments of the present utility model, the included angle between the surface of the first boss 31 facing away from the first overlapping edge 121 and the mold opening direction of the die-cast part 100 is greater than or equal to 1.5°. This facilitates the demolding of the die-cast body 1 and the first boss 31, and avoids edge wear or deformation of the die-cast body 1 and the first boss 31.

[0051] In some embodiments of the present utility model, as Figure 4 shown, the overlapping edge 12 includes a second overlapping edge 122, the second overlapping edge 122 is perpendicular to the mold opening direction of the die-cast part 100, and a plurality of bosses 3 include a second boss 32, and the second boss 32 is arranged on the second overlapping edge 122. The extending direction of the rivet can be the same as the mold opening direction, so that the connection between the die-cast body 1 and the connecting member in the direction same as the mold opening direction can be realized.

[0052] Among them, in the example shown in Figure 4 , the surface of the second boss 32 facing away from the connecting member is a plane and perpendicular to the mold opening direction of the die-cast part 100.

[0053] In some embodiments of the present utility model, the cross-section of the second boss 32 is circular, and the diameter of the second boss 32 is greater than or equal to 23 mm. Thus, in the radial direction of the rivet, a relatively large remaining material thickness of the bottom plate, that is, the second overlapping edge 122, can be ensured within the connection range of the rivet, reducing the material deformation amount of the second overlapping edge 122, and reducing or even eliminating the cracking tendency of the second overlapping edge 122, thereby solving the problem of cracking of the self-piercing riveting connection area 2 on the second overlapping edge 122. At the same time, the interlocking value of the rivet between the upper and lower plates is increased, and the connection strength is improved.

[0054] In some embodiments of the present utility model, the shape composition of the cross-section of the boss 3 can be flexibly set according to the actual situation. For example, the cross-section of the second boss 32 can be circular as shown in Figure 4 , and can also be set as an ellipse or a polygon or other shape compositions that can achieve the same effect, which are all within the protection scope of the present utility model.

[0055] In some embodiments of the present utility model, a fillet is provided between the second boss 32 and the second overlapping edge 122, and the radius of the fillet is greater than or equal to 0.25 mm. This can ensure the smooth filling and demolding of the second boss 32 and the die-cast body 1, and the processing technology is simple and easy to process.

[0056] In some embodiments of the present utility model, there is a fillet between the peripheral wall of the second boss 32 and the surface of the second boss 32 facing away from the second overlapping edge 122.

[0057] In some embodiments of the present utility model, the mold for forming the die-casting body 1 has a gate. The height of any two bosses 3 among the plurality of bosses 3 that are relatively far from the gate is greater than the height of the boss 3 that is relatively close to the gate. The height of the boss 3 increases as the distance between the position of the boss 3 and the gate of the mold for forming the die-casting body 1 increases, ensuring sufficient remaining thickness of the bottom plate for the self-piercing riveting connection area 2. Thus, at any position of the die-casting body 1, the height of the provided boss 3 can reduce the deformation amount of the material at the bottom of the die-casting body 1, thereby reducing or eliminating the cracking tendency of the die-casting body 1 and solving the problem of cracking in the self-piercing riveting connection area 2 at any position of the die-casting part.

[0058] In some embodiments of the present utility model, the height of the boss 3 is 0.5 mm - 1.5 mm. For example, when the distance between the self-piercing riveting connection area 2 and the gate of the mold for forming the die-casting body 1 is 1200 mm - 1350 mm, the height of the boss 3 is set to 0.5 mm. When the distance between the self-piercing riveting connection area 2 and the gate of the mold for forming the die-casting body 1 is 1350 mm - 1500 mm, the height of the boss 3 is set to 1.0 mm. When the distance between the self-piercing riveting connection area 2 and the gate of the mold for forming the die-casting body 1 is 1500 mm - 1700 mm, the height of the boss 3 is set to 1.5 mm. This avoids the situation where when the distance between the position of the boss 3 in the self-piercing riveting connection area 2 and the gate of the mold for forming the die-casting body 1 is relatively far, and the height of the boss 3 in the self-piercing riveting connection area 2 is too low, resulting in the inability to solve the problem of material cracking at the position of the self-piercing riveting connection area 2. At the same time, it prevents the situation where when the distance between the position of the boss 3 in the self-piercing riveting connection area 2 and the gate of the mold for forming the die-casting body 1 is relatively close, the height of the boss 3 in the self-piercing riveting connection area 2 is too high, causing unnecessary material consumption.

[0059] In some embodiments of the present utility model, the die-casting part 100 is an aluminum alloy part. The aluminum alloy die-casting part has relatively high strength and stiffness, which can effectively improve the anti-deformation ability and protection ability of the structure of the die-casting part 100. Moreover, the fatigue life of the aluminum alloy material is longer than that of the traditional steel material, which can extend the service life of the die-casting part 100. At the same time, the density of the aluminum alloy material is smaller than that of the steel material, and the weight is also relatively lighter, which can effectively reduce the overall mass of the die-casting part 100 and achieve lightweight. The aluminum alloy material also has good corrosion resistance, oxidation resistance, heat resistance and workability, so it can effectively improve the stability and reliability of the die-casting part 100.

[0060] A vehicle according to an embodiment of the present utility model includes the above-mentioned die-casting part 100 and a connecting part. The die-casting body 1 of the above-mentioned die-casting part 100 is connected to the connecting part through a self-piercing riveting connection process. The die-casting part 100 of the present application can be applied to body structures such as the front engine compartment and the rear floor of the vehicle, which can accelerate the production and processing of the body structure, reduce production costs, and increase product profits.

[0061] Among them, the connecting part serves as the upper layer plate, the die-casting body 1 of the die-casting part 100 serves as the lower layer plate, and the connecting part of the rivet penetrates from the upper connecting part and enters the lower die-casting body 1, and the connecting part of the rivet does not penetrate out of the lower die-casting body 1, ensuring that the connection between the connecting part and the die-casting part 100 is firm and reliable.

[0062] For a vehicle according to an embodiment of the present utility model, by providing the above-mentioned die-casting part 100, a boss 3 is provided on the side of the self-piercing riveting connection area 2 of the die-casting body 1 facing away from the connecting part, which can increase the remaining material thickness of the self-piercing riveting connection area 2 of the die-casting body 1, increase the distance between the bottom of the rivet and the bottom of the die-casting body 1, reduce the amount of material deformation at the bottom of the die-casting body 1, thereby reducing or eliminating the cracking tendency of the die-casting body 1 and solving the problem of cracking of the die-casting part in the self-piercing riveting connection area 2. At the same time, the interlock value of the self-piercing riveting connection area 2 can be increased, and the strength of the self-piercing riveting connection area 2 can be enhanced.

[0063] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0064] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A die casting, characterized in that: include: A die-cast body, which is suitable for connecting with a connector through a self-piercing riveting process. The die-cast body has a self-piercing riveting area, which has a boss, and the boss is located on the side of the die-cast body away from the connector.

2. The die casting according to claim 1, characterized in that: There are a plurality of self-piercing rivet connection areas, and there are a plurality of bosses corresponding one-to-one to the plurality of self-piercing rivet connection areas.

3. The die casting according to claim 2, characterized in that: The die-cast body comprises a body part and an overlap edge connected to the body part, the overlap edge is suitable for being connected to the connector by a self-piercing riveting process, and the self-piercing riveting connection area and the boss are arranged on the overlap edge.

4. The die casting according to claim 3, characterized in that: The overlapping edge includes a first overlapping edge, the first overlapping edge is parallel to the mold opening direction of the die casting, and the plurality of bosses include a first boss, and the first boss is arranged on the first overlapping edge.

5. The die casting according to claim 4, characterized in that The first boss comprises: a first convex portion, wherein the first convex portion is spaced apart from the main body portion, and the first overlapping edge at the position where the first convex portion is located is connected to the connecting member; The second convex portion is located between the first convex portion and the main body portion and has two ends connected to the first convex portion and the main body portion respectively. In the direction from the first convex portion to the main body portion, the width of the first boss gradually increases.

6. The die casting according to claim 5, characterized in that The cross section of the first convex portion is circular, and the two opposite side walls of the second convex portion are tangent to the two opposite sides of the first convex portion.

7. The die casting according to claim 6, characterized in that The diameter of the first convex portion is greater than or equal to 23 mm.

8. The die casting according to claim 5, characterized in that In the cross section of the first boss, the angles between the side walls on the opposite sides of the second convex portion and the mold opening direction of the die casting are both greater than or equal to 5°.

9. The die casting according to claim 4, characterized in that: Along the mold opening direction of the die casting, in the direction from the main body to the first boss, the surface of the first boss away from the first overlapping edge is inclined toward a direction close to the first overlapping edge.

10. The die casting according to claim 9, characterized in that An angle between a surface of the first boss facing away from the first overlapping edge and a mold opening direction of the die casting is greater than or equal to 1.5°.

11. The die casting according to claim 3, characterized in that The overlapping edge includes a second overlapping edge, the second overlapping edge is perpendicular to the mold opening direction of the die casting, and the plurality of bosses include a second boss, and the second boss is arranged on the second overlapping edge.

12. The die casting according to claim 11, characterized in that The cross section of the second boss is circular, and the diameter of the second boss is greater than or equal to 23 mm.

13. The die casting according to claim 11, characterized in that A rounded corner is provided between the second boss and the second overlapping edge, and the radius of the rounded corner is greater than or equal to 0.25 mm.

14. The die casting according to claim 2, characterized in that The mold for forming the die-cast body has a gate, and the height of any two of the plurality of bosses that are relatively far from the gate is greater than the height of the boss that is closer to the gate.

15. The die casting according to any one of claims 1 to 14, characterized in that: The height of the boss is 0.5mm-1.5mm.

16. The die casting according to any one of claims 1 to 14, characterized in that: The die casting is an aluminum alloy part.

17. A vehicle, characterized in that: include: The die casting according to any one of claims 1 to 16; The die-cast body and the connecting piece are connected by a self-piercing riveting process.

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